Is Pressure Important in Thermodynamics of Solid Materials?

AI Thread Summary
In thermodynamics of solid materials, pressure is often considered negligible, especially in cases where the solid is in a vacuum, leading to a pressure of zero. However, internal pressure can exist and is influenced by the material's internal structure. The significance of pressure becomes more relevant in extreme conditions, such as within the Earth's core. Overall, for most solid materials, pressure does not play a crucial role in thermodynamic descriptions. Understanding these dynamics is essential for studying materials under varying environmental conditions.
Arham
Messages
26
Reaction score
0
Hi. Consider a solid body placed in vacuum. How much is its pressure? Can we describe this body using thermodynamics if its pressure is zero?
 
Physics news on Phys.org
There can be a pressure in the interior, and it depends on the internal structure of the material.
For thermodynamics in solid materials, pressure is usually not very important (unless you consider the core of Earth or similar extreme materials).
 
The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
Thread 'Beam on an inclined plane'
Hello! I have a question regarding a beam on an inclined plane. I was considering a beam resting on two supports attached to an inclined plane. I was almost sure that the lower support must be more loaded. My imagination about this problem is shown in the picture below. Here is how I wrote the condition of equilibrium forces: $$ \begin{cases} F_{g\parallel}=F_{t1}+F_{t2}, \\ F_{g\perp}=F_{r1}+F_{r2} \end{cases}. $$ On the other hand...
Back
Top